報告題目:基于遙感影像的中國城市建筑面積研究

報告時間：2023年11月1日上午9:30

報告地點：437bwin必贏國際官網B404會議室

報告人：Susie Xi Rao

報告人國籍：中國

報告人單位：蘇黎世聯邦理工學院

報告人簡介：Susie Xi Rao，蘇黎世聯邦理工學院（ETH）博士后研究員；盧塞恩應用科學與藝術大學（HSLU）講師。她的研究興趣包括圖數據的模式挖掘、信息提取和自然語言處理，研究成果發表在AAAI、CIDR、CIKM、ICCHP、ICDE、ICJNLP、ICLR、JURIX、KDD、NAACL、VLDB和《中國經濟周刊》等重要國際會議和期刊上。

報告摘要：In this talk, we discuss a first milestone in measuring the floorspace of buildings for 40 major Chinese cities. The intent is to maximize city coverage and, eventually provide longitudinal data. We use a multi-task object segmenter approach to learn the building footprint and height in the same framework in parallel: (1) we determine the surface area is covered by any buildings (the square footage of occupied land); (2) we determine floorspace from multi-image representations of buildings from various angles to determine the height of buildings. We use Sentinel-1 and -2 satellite images as our main data source. We provide a detailed description of our data, algorithms, and evaluations. In addition, we analyze the quality of reference data and their role for measuring the building floorspace with minimal error. We conduct extensive quantitative and qualitative analyses with Shenzhen as a case study using our multi-task learner. Finally, we conduct correlation studies between our results (on both pixel and aggregated urban area levels) and nightlight data to gauge the merits of our approach in studying urban development.

邀請人：江佳偉